Question

The up and down motion of the water along the surface of the sea is called ______.

• A. tide
• B. current
• C. waves
• D. ebb

Answer 1

Answer: (C)

waves

• Waves are nothing but the oscillatory movements that result in the rise and fall of water surface.
  
• Waves are a kind of horizontal movements of the ocean water.
  
• They are actually the energy, not the water as such, which moves across the ocean surface.
  
• This energy for the waves is provided by the wind.
  
• In a wave, the movement of each water particle is in a circular manner.
  

• A wave has two major parts: the raised part is called as the crest while the low-point is called as the trough.